.lgx-1/x=0有解得区域 A(0,1] B(1,10] C(10,100]D(100,+∞]

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.lgx-1/x=0有解得区域A(0,1]B(1,10]C(10,100]D(100,+∞].lgx-1/x=0有解得区域A(0,1]B(1,10]C(10,100]D(100,+∞].lgx-1/x

.lgx-1/x=0有解得区域 A(0,1] B(1,10] C(10,100]D(100,+∞]
.lgx-1/x=0有解得区域 A(0,1] B(1,10] C(10,100]D(100,+∞]

.lgx-1/x=0有解得区域 A(0,1] B(1,10] C(10,100]D(100,+∞]
根据二分法.设F(X)=lgx-1/x.
F(1)=0-1=-10
F(1)F(10)